POPL's full name is the routing test: Principles of Programming Languages. The venue's center of gravity is a general truth about languages — a semantics, a type discipline, a program logic, a proof technique — established by definition and theorem. Both theoretical and experimental papers are welcome under the posted scope, but an experimental POPL paper still orbits a principle. (Scope wording per the POPL series pages, read 2026-07-08.)
| Project signature | Better venue | Reason |
|---|---|---|
| New program logic + soundness proof + small case studies | POPL | Principle first, evidence supporting |
| Compiler optimization with 1.4x speedups, proofs optional | PLDI | Benchmark-carried claim, implementor jury |
| Language design evaluated by user study or corpus mining | OOPSLA | Broader empirical evidence culture |
| Typed FP abstraction, elegant library, paradigm-native | ICFP | The functional-programming home crowd |
| Pure model/automata/logic result, thin language connection | LICS / CSL / FSCD | Logic-side siblings want it more |
| Decision procedure, model checker, solver improvement | CAV / TACAS | Verification-algorithm reviewers |
| Proof-engineering technique, assistant infrastructure | CPP / ITP | Mechanization-first audience (CPP co-locates with POPL) |
| Solid but regional-scale PL result, or needs journal length | ESOP / TOPLAS / JFP / LMCS | Right bar, right format |
All of POPL, PLDI, OOPSLA, and ICFP publish in PACMPL, so the archival venue is identical — choose by reviewer community and evidence shape, never by deadline proximity.
Fit test (fill honestly):
Central claim: ..............................................
Decisive evidence: [ ] proof [ ] mechanization [ ] measurements [ ] study
Who must believe it: [ ] semanticists [ ] implementors [ ] tool users
Survives artifact deletion? [ ] yes [ ] no
=> POPL only if column one dominates and the answer is "yes".
[POPL fit] strong / plausible with reframing / route elsewhere
[Central claim] <the one-sentence version>
[Evidence shape] <proof / mechanization / empirical mix>
[Reframe path] <what to foreground if staying at POPL>
[Alternative] <venue + one-line reason, if routing away>